package com.wwg.design.patten.observer.case1;

/**
 * @类描述: TODO
 * @Author wwg
 * @date: 2021/7/21 10:34
 * @Version: 1.0
 **/
public interface ISubject {
    public void addObserver(AbstractObserver observer);

    void addObserver(IObserver... arg);

    public void someThingHappen(String someThing);
}
